Definite Integral from First Principle | ∫eˣ dx and ∫x² dx Using Limit of Sum | 1st Year Calculus

In this video, we derive the definite integrals of exponential and polynomial functions using the First Principle of Integration (Limit of Sum / Riemann Sum Method). Topics Covered: ✅ Definite Integral from First Principle ✅ Riemann Sum Formula ✅ Evaluation of ∫eˣ dx from a to b ✅ Evaluation of ∫x² dx from a to b ✅ Step-by-Step Derivation ✅ BSc 1st Year Calculus This lecture is specially designed for BSc First Year Mathematics students and will help in university examinations and concept building. 📚 Subject: Calculus 🎓 Class: BSc 1st Year 📝 Topic: Definite Integral from First Principle #Calculus #DefiniteIntegral #RiemannSum #BScMathematics #BScFirstYear #Mathematics #Integration #LimitOfSum